<!DOCTYPE html>
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
    <meta name="apple-mobile-web-app-capable" content="yes">
    <title>OpenLayers: Point Track Markers</title>
    <link rel="stylesheet" href="../theme/default/style.css" type="text/css">
    <link rel="stylesheet" href="style.css" type="text/css">
    <script src="../lib/OpenLayers.js"></script>
    <script type="text/javascript">
        var map, layer, rss, lineFeatures, popup;

        OpenLayers.ProxyHost = "proxy.cgi?url=";
        function init(){
            map = new OpenLayers.Map('map', {maxResolution:'auto'});
            layer = new OpenLayers.Layer.WMS( "OpenLayers WMS", 
                    "http://vmap0.tiles.osgeo.org/wms/vmap0", {layers: 'basic'} );
            map.addLayer(layer);
            map.setCenter(new OpenLayers.LonLat(20.22, 22.05), 9);
            map.addControl(new OpenLayers.Control.LayerSwitcher());
        }

        function addUrl() {
            var urlObj = OpenLayers.Util.getElement('url'); 
            var value = urlObj.value;
            var parts = value.split("/");
            rss = new OpenLayers.Layer.GeoRSS(parts[parts.length-1], value);
            rss.events.register("loadend", window, populateMap);
            map.addLayer(rss);
        }

        function populateMap() {
            // create the point track layer
            var lineLayer = new OpenLayers.Layer.PointTrack(rss.name + " Track",
                    {dataFrom: OpenLayers.Layer.PointTrack.dataFrom.SOURCE_NODE});
            // add the features from the rss layer to the track layer. This
            // also works with OpenLayers.Feature.Vector features.
            lineLayer.addNodes(rss.features);
            map.addLayer(lineLayer);
            
            rss.setName(rss.name + " Comments");
            
            var feature, marker;
            // only show markers for features that are not "Untitled"
            for (var i = rss.features.length-1; i>0; i--) {
                if (rss.features[i].data.popupContentHTML.indexOf(
                        "Untitled") != -1) {
                    rss.removeMarker(rss.markers[i]);
                }
            }
            
            // keep markers on top of tracks
            map.raiseLayer(rss, 1);
        }
    </script>
  </head>
  <body onload="init()">
    <h1 id="title">GeoRSS PointTrack in OpenLayers</h1>
    <div id="tags">
        GeoRSS, PointTrack
    </div>
    <p id="shortdesc">This demo uses OpenLayers.Layer.GeoRSS and OpenLayers.Layer.PointTrack.</p>
    <p style="font-size:.9em;">The track is created by connecting the points of the GeoRSS feed.</a></p>
    <form onsubmit="return false;">
   GeoRSS URL: <input type="text" id="url" size="50" /><input type="submit" onclick="addUrl(); return false;" value="Load Feed" onsubmit="addUrl(); return false;" />
    </form>  
    <p>The above input box allows the input of a URL to a GeoRSS feed. This feed can be local to the HTML page -- for example, entering 'xml/track1.xml' will work by default.</p>
    <p>The example shows a track, displayed as a line connecting the points of the feed. It also shows markers at positions that have a title tag in the rss item. If clicked, a popup will show title and description.</p>   
    <div id="map" class="smallmap"></div>
  </body>
</html>
